在asp.net中用以下方法读取网页内容时，出现操作已超时！错误，而同样代码在winform中可以读取，
这是为什么？请各位高人指点。。
WebClient wc = new WebClient();
StreamReader sr = new StreamReader(wc.OpenRead(url));
string re = sr.ReadToEnd();
sr.Close();
这是为什么？请各位高人指点。。
WebClient wc = new WebClient();
StreamReader sr = new StreamReader(wc.OpenRead(url));
string re = sr.ReadToEnd();
sr.Close();
<%@ import namespace="System.IO"%><%
dim wc as WebClient = new WebClient()
dim sr as StreamReader = new StreamReader(wc.OpenRead("http://www.yisou.com"))
dim re as string = sr.ReadToEnd()
sr.Close()response.write(re)
%>没有任何问题，看看你的url是否需要post提交。
Server.ScriptTimeout = XXX;
GetPageHtml.aspx<％@ Page language="c#" validateRequest = "false" Codebehind="GetPageHtml.aspx.cs"
AutoEventWireup="false" Inherits="eMeng.Exam.GetPageHtml" ％>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >
<HTML>
<HEAD>
<title>得到网页源代码</title>
<meta name="GENERATOR" Content="Microsoft Visual Studio 7.0">
<meta name="CODE_LANGUAGE" Content="C#">
<meta name="vs_defaultClientScript" content="JavaScript">
<meta name="vs_targetSchema" content="http://schemas.microsoft.com/intellisense/ie5">
</HEAD>
<body MS_POSITIONING="GridLayout">
<form id="aspNetBuffer" method="post" runat="server">
<div align="center" style="FONT-WEIGHT: bold">得到任意网页源代码</div>
＜asp:TextBox id="UrlText" runat="server" Width="400px">http://dotnet.aspx.cc/content.aspx
＜/asp:TextBox>
＜asp:Button id="WebClientButton" Runat="server" Text="用WebClient得到">＜/asp:Button>
＜asp:Button id="WebRequestButton" runat="server" Text="用WebRequest得到">＜/asp:Button>
<br>
＜asp:TextBox id="ContentHtml" runat="server" Width="100％" Height="360px" TextMode="MultiLine">
＜/asp:TextBox>
</form>
</body>
</HTML>GetPageHtml.aspx.csusing System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.IO;
using System.Net;
using System.Text;namespace eMeng.Exam
{
/// <summary>
/// GetPageHtml 的摘要说明。
/// </summary>
public class GetPageHtml : System.Web.UI.Page
{
protected System.Web.UI.WebControls.Button WebClientButton;
protected System.Web.UI.WebControls.Button WebRequestButton;
protected System.Web.UI.WebControls.TextBox ContentHtml;
protected System.Web.UI.WebControls.TextBox UrlText;
private string PageUrl = "";
private void Page_Load(object sender, System.EventArgs e)
{} #region Web Form Designer generated code
override protected void OnInit(EventArgs e)
{
InitializeComponent();
base.OnInit(e);
} /// <summary>
/// 设计器支持所需的方法 - 不要使用代码编辑器修改
/// 此方法的内容。
/// </summary>
private void InitializeComponent()
{
this.WebClientButton.Click += new System.EventHandler(this.WebClientButton_Click);
this.WebRequestButton.Click += new System.EventHandler(this.WebRequestButton_Click);
this.Load += new System.EventHandler(this.Page_Load);
}
#endregion
private void WebClientButton_Click(object sender, System.EventArgs e)
{
PageUrl = UrlText.Text;
WebClient wc = new WebClient();
wc.Credentials = CredentialCache.DefaultCredentials; ///方法一：
Byte[] pageData = wc.DownloadData(PageUrl);
ContentHtml.Text = Encoding.Default.GetString(pageData); /// 方法二：
/// ***************代码开始**********
/// Stream resStream = wc.OpenRead(PageUrl);
/// StreamReader sr = new StreamReader(resStream,System.Text.Encoding.Default);
/// ContentHtml.Text = sr.ReadToEnd();
/// resStream.Close();
/// **************代码结束********
///
wc.Dispose();
} private void WebRequestButton_Click(object sender, System.EventArgs e)
{
PageUrl = UrlText.Text;
WebRequest request = WebRequest.Create(PageUrl);
WebResponse response = request.GetResponse();
Stream resStream = response.GetResponseStream();
StreamReader sr = new StreamReader(resStream, System.Text.Encoding.Default);
ContentHtml.Text = sr.ReadToEnd();
resStream.Close();
sr.Close();
}
}
}
function getHTML(strURL)
{
var string,str="数据库";// = "str";
oReq = new ActiveXObject("MSXML2.XMLHTTP");
oReq.open("POST",strURL,false);
oReq.setRequestHeader("Content-Length",str.length);
oReq.setRequestHeader("CONTENT-TYPE","application/x-www-form-urlencoded");//没有这句就玩不转拉
oReq.send(string);
if (oReq.status!=200) {
alert('错误,可能是网络不通或服务器故障或其他原因:'+oReq.statusText);
return;
}
为什么用脚本在我机子上执行的很快，而用以上的方法却不行？